---
product_id: 307788953
title: "Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels"
brand: "mongoose"
price: "¥89426"
currency: JPY
in_stock: false
reviews_count: 8
url: https://www.desertcart.jp/products/307788953-mongoose-legion-freestyle-bmx-bike-for-advanced-level-or-professional
store_origin: JP
region: Japan
---

# 170mm forged steel crank 4130 Chromoly steel frame 20-inch pro-grade wheels Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels

**Brand:** mongoose
**Price:** ¥89426
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Own the park with pro-grade precision and style!

## Quick Answers

- **What is this?** Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels by mongoose
- **How much does it cost?** ¥89426 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/307788953-mongoose-legion-freestyle-bmx-bike-for-advanced-level-or-professional)

## Best For

- mongoose enthusiasts

## Why This Product

- Trusted mongoose brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Control:** Equipped with a 170mm one-piece forged steel crank and 25T steel chainring for smooth, reliable power transfer.
- • **Pro-Level Durability:** Built with a rugged 4130 Chromoly frame designed to withstand intense freestyle tricks and jumps.
- • **Trusted BMX Essentials:** Hi-Ten steel handlebars, fork, and U-brake system provide responsive handling and confident stopping power.
- • **High-Performance Wheels:** 20” x 2.25” tires on aluminum single-wall 36H rims deliver superior grip and agility on any terrain.
- • **Optimized Ride Geometry:** 20-inch top tube length tailored for riders between 4’4” and 5’0” ensuring perfect fit and control.

## Overview

The Mongoose Legion Freestyle BMX Bike is engineered for advanced and professional riders seeking durability and performance. Featuring a tough 4130 Chromoly frame, 20-inch wheels optimized for agility, and a precision drivetrain, this BMX delivers the perfect blend of strength and control for freestyle riding. Ideal for riders 4’4” to 5’0”, it’s a top choice for those ready to elevate their tricks and dominate the skatepark.

## Description

With the Legion Series, Mongoose offers a full line of freestyle style bikes for riders of all ages and ability levels. The Legion L10 is a great first 20” BMX-style bike that features the geometry and feel preferred by today’s riders!

Review: Great bike for beginners - My son is very happy with his new bmx bike. He has used it many times at the skatepark and it seems very safe and durable. My only complaint is that we paid for assembly and the company that did the assembly charged us extra. desertcart needs to fix this automatic assembly feature to be the correct price.
Review: Strong - Strong and reliable for tricks and jumps.

## Features

- Durable Hi-Ten Steel frame.
- Drivetrain features 170 mm one-piece forged steel crank with a 25T steel chainring and American loose ball bottom bracket.
- 20” x 2.25” tires mounted on aluminum single wall 36H rims with 3/8” in axle front hub and 9T cog ball bearing cassette rear hub.
- Hi-Ten handlebar and fork, 48 mm stem, standard 1-1/8” headset, and steel U-brake and aluminum/resin brake levers.
- 20” top tube length. Suggested rider height is 4’4” – 5’0”.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07W7NYH2B |
| Age Range | Adult |
| Batteries Included? | No |
| Best Sellers Rank | #40,741 in Sporting Goods ( See Top 100 in Sporting Goods ) #21 in BMX Bikes |
| Bike Type | BMX Bike |
| Brake Type | U Brake |
| Brand | Mongoose |
| Color | Red |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,048) |
| Date First Available | 21 October 2019 |
| Department | Unisex-Adult |
| Features | Aluminum Frame, BMX, freestyle |
| Frame Material | Alloy Steel |
| Frame Size | 20 Inches |
| Included Components | Mongoose Legion L10 Freestyle BMX Bike |
| Item model number | M41900U20OS-PC |
| Manufacturer | Pacific Cycle, Inc. |
| Material Type | Hi-Ten steel |
| Number of Items | 1 |
| Number of Speeds | 1 |
| Power Source | manual |
| Product Dimensions | 60 x 22 x 124 cm; 12 kg |
| Size | One Size |
| Skill Level | Beginner |
| Style | Legion L10 |
| Suspension | Rigid |
| Usage | Trail |
| Wheel Size | 20 Inches |
| handle-type | BMX Bar |

## Product Details

- **Age range (description):** Adult
- **Bike type:** BMX Bike
- **Brand:** Mongoose
- **Colour:** Red
- **Number of speeds:** 1

## Images

![Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels - Image 1](https://m.media-amazon.com/images/I/51k2JY1FVYL.jpg)
![Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels - Image 2](https://m.media-amazon.com/images/I/61Pf9+sHH0L.jpg)
![Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels - Image 3](https://m.media-amazon.com/images/I/712utpzTimL.jpg)
![Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels - Image 4](https://m.media-amazon.com/images/I/713yhItci6L.jpg)
![Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels - Image 5](https://m.media-amazon.com/images/I/71fAns3eBhL.jpg)

## Questions & Answers

**Q: Is there a way to adjust the distance of the handbrake lever to the handle bar? My sons hands can clasp it safely and the screw on the side doesnt do**
A: There is a reach adjustment screw which is a small phillips screw. That'll move that lever closer and further away from the handelbar. Thanks.

**Q: It says this typically ships within 1 to 2 months. How soon should I expect this item to actually ship and will it really take up to 2 months?**
A: I ordered when it was in stock showed up within 3 days.  It could take the whole 2 months, as shipping sucks lately and also the 18" bike has been backordered in multiple brands for a while now.

**Q: Can u put a bigger seat on it so it’s easier to sit and pedal?**
A: I would say so.  It’s a skinny seat for tricks my grandson said.  He’s 9.  Lol

**Q: Why did my bike come with no pedals**
A: Hi. We're sorry to hear that. Within the product's one-year limited warranty, we'd be happy to provide replacements for pedals that were missing. We ask you to please reach out to us at 800-626-2811, Monday-Friday 7 am-6 pm CST. We are also available via DM on Facebook, Instagram, and Twitter. Please have your bike’s model number and date code handy. These can be found on a black and silver sticker on the frame above the pedal area. Warm Regards

## Customer Reviews

### ⭐⭐⭐⭐ Great bike for beginners
*by D***N on 19 March 2024*

My son is very happy with his new bmx bike. He has used it many times at the skatepark and it seems very safe and durable. My only complaint is that we paid for assembly and the company that did the assembly charged us extra. Amazon needs to fix this automatic assembly feature to be the correct price.

### ⭐⭐⭐⭐⭐ Strong
*by L***K on 9 June 2024*

Strong and reliable for tricks and jumps.

### ⭐⭐⭐⭐⭐ Best bike on earth
*by U***7 on 21 May 2021*

It is a very good bmx it is very durable I recommend every one to buy it.

## Frequently Bought Together

- Mongoose Legion Kids Freestyle Sidewalk BMX Bike, Beginner Riders, Boys and Girls, 16-20-inch Wheels, Hi-Ten Steel Frame, Micro Drive BMX Gearing
- Zelerdo 2 Pairs Aluminum Alloy Bike Pegs for Mountain Bike Cycling Rear Stunt Pegs Fit 3/8 inch Axles
- 80Six Dual Certified Kids Bike, Scooter, and Skateboard Helmet, Designed by Industry Leading Brand Triple 8

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/307788953-mongoose-legion-freestyle-bmx-bike-for-advanced-level-or-professional](https://www.desertcart.jp/products/307788953-mongoose-legion-freestyle-bmx-bike-for-advanced-level-or-professional)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-26*